JP2002034281A - Motor control device and air conditioner - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To eliminate or reduce the influence of temperature change,
Provided is a motor control device capable of preventing a decrease in drive efficiency, achieving low vibration and low noise, and further improving the stability of drive control. In a motor control device that controls a motor, a temperature estimating unit estimates a motor temperature from an operation mode such as cooling and heating and an operation elapsed time, and a winding of the motor based on the estimated temperature. The temperature drift of the resistance, the induced voltage constant or both is calculated. The angle estimation calculation is performed based on the calculated induced voltage constant or the value of the winding resistance, thereby improving the estimation accuracy. Thus, by improving the estimation accuracy, it is possible to improve operation stability, improve efficiency, or reduce noise and vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor control device and an air conditioner, and more particularly to a drive control technique for a compressor motor of an air conditioner or the like.

[0002]

2. Description of the Related Art In recent years, environmental demands for home appliances, such as energy saving and recycling, have been increasing. The requirements for air conditioners are the same, and manufacturers are accelerating their efforts to achieve higher efficiency and lower noise and vibration in order to meet such requirements.

[0003] One of the measures which is rapidly spreading as a measure for realizing high efficiency is the DC brushless compressor motor. In particular, due to the introduction of the top runner method and the like regarding efficiency, the DC brushless motor and its driving technology have become indispensable technologies for increasing the efficiency of the air conditioner.

However, there are the following problems in improving the efficiency of such a compressor motor by using a DC brushless motor. That is, the vibration and noise caused by the use of the permanent magnet and its control method. Thus, in the drive control technology of the compressor motor, a technology capable of realizing further low vibration and low noise while maintaining high efficiency is required.

[0005] One of the drive control techniques for reducing the noise of the compressor motor is to make the motor current sinusoidal. This aims to reduce noise and vibration caused by cogging and torque ripple, which have been problems in the conventional rectangular wave energization, by driving the compressor motor with a sine wave.

A conventional DC brushless motor drive control method is to perform drive control by obtaining rotor position information from an induced voltage generated in a stator winding due to rotation of a rotor constituted by permanent magnets. . However, in this method, in order to observe the induced voltage, it is necessary to provide a non-conducting section in the current flowing through each phase of the motor (hereinafter, referred to as “motor current”). As a result, the motor current becomes discontinuous, and cogging and torque ripple occur, which cause vibration and noise.

The sine wave drive control system described above is being developed to solve these problems. In this control method, the motor current and the voltage of the motor are measured, and the position of the magnetic pole of the rotor is estimated by performing an operation using a predetermined operation expression, thereby controlling the drive of the motor. In this control method, a phenomenon that causes noise and vibration due to cogging, torque ripple, and the like can be reduced by controlling the current waveform in a sine wave shape.

As a sine-wave drive control technique for a compressor motor, a technique that has been established at the present time is described in, for example, a paper “Sensorless Brushless DC Motor Control Based on Current Estimation Error (IEEE Transactions D, 1995, 115, 115). No. 4) "
And the like, using a current sensor disclosed in US Pat. Hereinafter, this control method will be briefly described.

The motor phases are U-phase, V-phase, and W-phase, and the voltages and currents of the respective layers are Vu, V
Let v, Vw and iu, iv, iw. In this control method, in order to make the control calculation easier, the voltage and current of each phase are subjected to dq conversion by the following equations (1) and (2), respectively, to be converted to direct current. In Equation (1), ω is the angular velocity of the motor, t is time, and π is the pi.

Here, assuming that the winding resistance of the motor is R, the inductance is L, and the induced voltage constant is φ, the motor model equation showing the relationship between current and voltage is given by the following equation (3). expressed.

For example, as shown in FIG.
1 driven by electric power supplied from
, L, L and φ
Are given as parameters of the motor 104 in advance. Note that the conventional motor control device shown in FIG. 7 includes a rectifying / smoothing circuit 102, a switching element group 103, a drive control unit 107, a motor voltage calculation unit 113, two motor current conversion units 114 and 115, a magnetic pole A position estimating unit 116 and a voltage converting unit 117 are provided.

The motor current converting means 114, 11
5. More specifically, all or at least one of the motor currents iu, iv, and iw is obtained from a current sensor using a Hall element, a coil, and the like, and id and iq are calculated from the equation (2). Switching element group 1
03 and the voltage obtained from the voltage conversion means 117, all or at least one of the motor application voltages Vu, Vv, and Vw is obtained. , Vq.

[0013] While these may be obtained angle information theta _M by computing the formula (3), which is the estimated angle based on the above calculation, the true magnetic pole position, that is the actual angle theta
With an error Δθ.

The difference between the estimated angle θ _M and the actual angle θ, that is, the estimated error angle Δθ is the phase difference between the dq axis corresponding to the true magnetic pole position and the d′-q ′ axis corresponding to the estimated magnetic pole position. And is expressed by the following equation (4) based on FIG.

For the d'-q 'axes, the same relationship as in equation (3) holds for the program setting values R _M , L _M , and φ _M for the resistance, inductance, and induced voltage constant. Therefore, from these relationships, the estimated angle error Δθ is expressed by the following equation (5) by the difference between the true value and the set value of the resistance, the induced voltage, and the inductance. However, in the equation (5), A ₁ , A ₂ and A ₃ are proportional constants.

As is apparent from the above equation, the set values R _M ,
and φ _M, L _M, between the true value R corresponding thereto, phi, when there is a difference between the L, and the actual angle theta and the estimated angle theta _M,
Although the estimation error angle Δθ constantly occurs, there is a problem that Δθ increases in proportion to the difference therebetween. In addition, a certain error occurs between the set value and the true value of the resistance, the induced voltage constant, or the inductance due to variations in mass production. Also, even if the set value and the true value can be matched within a certain accuracy at the initial stage,
A true value drifts due to a temperature change occurring during operation, which affects estimation accuracy. In actual control,
The total value of the difference in the initial stage and the temperature drift affects the angle estimation.

Equation (5) indicates that other parameter errors are zero.
Is a formula that holds under the premise that
The errors of the two parameters interact to produce a larger estimation error.

[0018]

When the estimated error angle .DELTA..theta. Becomes large, the driving efficiency of the motor is reduced, and vibration and noise are increased, which may lead to a step-out stop or the like. Improvement of estimation accuracy is indispensable. In order to improve the angle estimation accuracy, individual variations during mass production can be dealt with by optimizing the specifications of components and motors and the fabrication. However, there is no measure to cope with a decrease in the angle estimation accuracy due to a temperature change.

The present invention has been made to solve a conventional problem such as a decrease in angle estimation accuracy due to such a temperature change. Then, even if the basic characteristics of the motor such as the resistance, the induced voltage constant, and the inductance fluctuate due to the temperature change, the influence of the temperature change is eliminated or reduced,
It is an object of the present invention to provide means capable of preventing a decrease in drive efficiency, achieving low vibration and low noise, and further improving the stability of drive control. .

[0020]

According to the present invention, there is provided a motor control apparatus comprising: (i) temperature conversion means for converting a temperature around a motor into a temperature signal corresponding to the temperature; (Ii) time measuring means for measuring an elapsed time from the start of operation of the motor, (iii) operating condition determining means for determining the operating condition of the motor, and (iv) a temperature signal output from the temperature converting means. Estimating and calculating the temperature of the motor and at least one of the windings and the rotor of the motor based on the operation elapsed time output from the time measuring means and the operating condition data output from the operating condition determining means. And (v) outputting a temperature compensation value for at least one of the winding resistance, the induced voltage constant, and the inductance based on the estimated temperature output from the temperature estimating means. And (vi) motor drive control using at least one of the temperature compensation value of the winding resistance, the temperature compensation value of the induced voltage constant, and the temperature compensation value of the inductance output from the temperature compensation means. And drive control means for performing the following. Hereinafter, this motor control device is referred to as a motor control device according to the first aspect of the present invention.

In this motor control device,
(Vii) a switching element group including a plurality of switching element rows in which two switching elements are connected in cascade, and (viii) an input to a rectifying / smoothing means connected in front of the switching element group in the power supply direction. (Ix) temperature estimating means, comprising at least one of input current converting means for converting the current to be supplied to a current signal corresponding to the current, and rotational speed detecting means for detecting the rotational speed of the motor. Is an input current signal output from the input current detection means,
It is preferable that the estimated temperature is calculated in consideration of at least one of the motor speed output from the speed detecting means. (X) The operating condition determining means determines the operating condition of the motor based on at least one of the input current signal output from the input current detecting device and the motor speed output from the speed detecting device. May be determined. Hereinafter, this motor control device is referred to as a motor control device according to the second aspect of the present invention.

In the above motor control device, (xi) voltage conversion means for converting a potential difference between the high potential side and the low potential side of the switching element group into a potential difference signal corresponding to the potential difference; Motor voltage calculating means for calculating a motor voltage signal based on the distribution ratio of the element group and the potential difference signal output from the voltage converting means, and (xiii) the temperature estimating means It is more preferable that the estimated temperature is calculated in consideration of the output motor voltage signal. (Xi
v) The operating condition determining means may determine the operating condition of the motor in consideration of the motor voltage signal output from the motor voltage calculating means. Hereinafter, this motor control device is referred to as a motor control device according to a third aspect of the present invention.

In the above motor control device, (xv) the motor control device is provided for at least one of the conductive wire groups for electrically connecting the switching element group and the motor winding corresponding to each connection point of the switching element row; The current flowing through the conductor is
A motor current conversion unit that converts the motor current signal into a motor current signal corresponding to the current; and (xvi) the temperature estimation unit calculates the estimated temperature in consideration of the motor current signal output from the motor current conversion unit. It is more preferred that In addition, (xvii) the operating condition determining means considers the motor current signal output from the motor current converting means,
The operation state of the motor may be determined. Hereinafter, this motor control device is referred to as a motor control device according to a fourth aspect of the present invention. These make it possible to estimate the temperature of the motor according to the operating conditions,
Even if the characteristics of the motor change due to temperature drift, stable drive control can be realized.

In the above motor control device, (xvii
i) magnetic pole position estimating means for estimating and calculating the magnetic pole position of the rotor based on the motor voltage signal, the motor current signal, the winding resistance temperature compensation value, the induced voltage constant temperature compensation value, and the inductance temperature compensation value. More preferably, (xix) the drive control means performs drive control of the motor based on the estimated magnetic pole position output from the magnetic pole position estimating means. Hereinafter, this motor control device is referred to as a motor control device according to a fifth aspect of the present invention.
As a result, the temperature of the motor can be estimated according to the operating conditions, and even if the characteristics of the motor change due to the temperature drift, highly accurate angle estimation becomes possible, and stable drive control can be realized.

Further, an air conditioner according to the present invention is an air conditioner using any one of the above motor control devices, wherein (a) a temperature conversion means is provided in an outdoor unit of the air conditioner. Function as an outside air temperature sensor, and the motor functions as a compressor motor mounted on the outdoor unit,
(B) Immediately before the operation of the motor is started, a temperature storage means for storing a temperature signal output from the outside air temperature sensor is provided, and (c) a temperature estimating means is provided at any time from the outside air temperature sensor. In consideration of the output temperature signal and an operation mode indicating cooling, heating or dehumidification, the temperature of at least one of the motor and at least one of the windings and the rotor of the motor is estimated and calculated. It is assumed that. In this air conditioner, stable motor drive control can be realized even in an environment where temperature conditions fluctuate greatly, such as in an air conditioner compressor.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a basic configuration of a motor control device according to a first embodiment of the present invention and a control mode thereof. As shown in FIG. 1, in this motor control device, AC power is supplied from a commercial power supply 1 to a rectifying / smoothing circuit 2 (rectifying / smoothing means). This AC power is converted to DC by the rectifying and smoothing circuit 2 and then input to the switching element group 3. The DC-converted power is supplied to the motor 4 according to the distribution ratio output from the drive control means 7.
To drive the motor 4.

The drive control means 7 sends an operation start signal and an operation state represented by operation modes such as cooling, heating and dehumidification to the time measuring means 8 and the operation state judging means 9, respectively. The time measuring means 8 and the operating condition determining means 9 respectively determine the operating time and the operating condition based on the transmitted information and send them to the temperature estimating means 10. Temperature estimation means 1
0 estimates the temperature of the stator and the rotor of the motor 4 based on the operation time, the operation state, and information from the temperature conversion means 5 for detecting the temperature around the motor 4 (ambient temperature), This estimated temperature is output to the temperature compensating means 11. As the temperature estimating method, a method based on a temperature table obtained experimentally in advance, a method based on a calculation formula using the operating time, the operating condition, and the ambient temperature as variables are used.

FIGS. 2A and 2B show the temperature estimating means 10.
Is a graph showing how the temperature changes when estimating the temperature. The horizontal axis represents the elapsed time (operation time) after the start of the operation, and the vertical axis represents the temperature. As shown in FIG. 2 (a), for each of the operation mode and the number of revolutions, a temperature curve obtained experimentally or by simulation, or a temperature calculation equation using the operation mode and the number of revolutions of the motor as input variables is used to estimate the temperature. It is stored in the means 10. The temperature estimating means 10
The output value of the temperature converter 5 immediately before the operation of the motor 4 is stored as an initial value of the ambient temperature.

During operation, for example, from the operating modes such as heating, cooling, and dehumidification of the air conditioner, and the motor speed, an estimation is made based on the above-mentioned temperature curve or temperature calculation formula and the initial value of the ambient temperature. Determine the temperature. When the operating conditions change due to a change in the number of revolutions during operation, for example, as shown in FIG.
Perform temperature estimation. Further, even when the ambient temperature changes during operation, the temperature estimation is performed in consideration of the influence of the temperature fluctuation.
Temperature compensating means 11 is based on the estimated temperature obtained above,
A temperature compensation value for at least one of the winding resistance, the induced voltage constant, and the inductance is output.

FIG. 1 shows an example in which a numerical value table is used as a method of temperature compensation in which temperature is associated with winding resistance, temperature is associated with induced voltage constant, or temperature is associated with inductance. ing. However, it is also possible to obtain a temperature compensation value by an operation using an equation using the estimated temperature as a variable. For example, the temperature variation of the winding resistance is substantially represented by the temperature characteristic of copper, and is expressed by the following equation. Here, in the above equation, ρ is the resistivity after temperature compensation, ρ ₀ is the resistivity at the reference temperature, α is the temperature coefficient of resistivity, T is the estimated temperature, and T ₀ is This is the reference temperature.

The drive control means 7 can perform more precise drive control by performing control using the winding resistance, induced voltage constant and inductance temperature-compensated by the temperature compensation means 11 as described above. . Here, the drive control means 7, the time measuring means 8, the operating condition determining means 9, the temperature estimating means 10 and the temperature compensating means 11 are configured independently of each other.
It is also possible to configure by integrating them into one integrated circuit or the like.

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described in detail with reference to FIG. However, Embodiment 2 shown in FIG. 3 has many points in common with Embodiment 1 shown in FIGS. Therefore, in order to avoid repetition of description, in Embodiment 2 shown in FIG. 3, members or elements common to FIG. 1 are denoted by the same reference numerals as in FIG. 1, and description thereof is omitted.

FIG. 3 is a diagram showing a basic configuration of a motor control device according to the second embodiment and a control mode thereof.
As shown in FIG. 3, in the second embodiment, the rectifying and smoothing circuit 2
The value of the power or current input to the
Input power conversion means 6 and a rotation speed detection means 12 for detecting the rotation speed of the motor 4. Other configurations are the same as those of the first embodiment shown in FIGS.

Thus, in the second embodiment, the temperature estimating means 10 calculates the input current input from the input current converting means 6 in addition to the operating time, the operating condition, and the ambient temperature.
By using (considering) the motor rotation speed input from the rotation speed detection means 12, a more accurate estimated temperature can be output.

(Embodiment 3) Hereinafter, Embodiment 3 of the present invention will be specifically described with reference to FIG. However, the third embodiment shown in FIG. 4 has many points in common with the second embodiment shown in FIG. Therefore, in order to avoid redundant description, in Embodiment 3 shown in FIG. 4, members or elements common to FIG. 3 are assigned the same reference numerals as in FIG. 3, and descriptions thereof are omitted.

FIG. 4 is a diagram showing a basic configuration of a motor control device according to the third embodiment and a control mode thereof.
As shown in FIG. 4, in the third embodiment, a motor voltage calculation unit 13 and a voltage side interval unit 17 are provided. Other configurations are the same as those of the second embodiment shown in FIG.

Thus, in the third embodiment, the motor voltage calculation means 13 calculates the motor voltage based on the distribution ratio output from the drive control means 7 and the output signal of the voltage conversion means 17. Then, the temperature estimating means 10
Is the operating time, the operating condition, the ambient temperature, the input current, and the motor speed, as well as the motor voltage calculating means 13.
By using (considering) the motor voltage output from, it is possible to output a more accurate estimated temperature. In particular, from the relationship between motor voltage and motor speed,
Since the load and efficiency of the motor 4 can be estimated, it is possible to estimate the temperature with high accuracy taking this into consideration.

Embodiment 4 Hereinafter, Embodiment 4 of the present invention will be specifically described with reference to FIG. However, Embodiment 4 shown in FIG. 5 has many points in common with Embodiment 3 shown in FIG. Therefore, in order to avoid repetition of description, in Embodiment 4 shown in FIG. 5, members or elements common to FIG. 4 are denoted by the same reference numerals as in FIG. 4, and description thereof is omitted.

FIG. 5 is a diagram showing a basic configuration of a motor control device according to the fourth embodiment and a control mode thereof.
As shown in FIG. 5, in the fourth embodiment, a first motor current converter 14 and a second motor current converter 15 are provided. Other configurations are the same as those of the third embodiment shown in FIG.
Is the same as

Thus, in the fourth embodiment, the first
Motor current converting means 14 and second motor current converting means 15
Is input to the drive control means 7. Here, the motor current value is calculated via the motor voltage calculation means 13 or directly.
Input to 0. Then, the temperature estimating means 10 uses the motor current value in addition to the operating time, the operating condition, the ambient temperature, the input current, the motor speed, and the motor voltage (by taking into account) the motor current value, thereby achieving higher accuracy. Can be output. In particular, since the load and efficiency of the motor 4 can be estimated from the relationship among the motor application voltage, the motor current, and the motor rotation speed, highly accurate temperature estimation that takes this into consideration can be performed. The outputs of the first motor current converter 14 and the second motor current converter 15 may be directly input to the temperature estimator 10.

Embodiment 5 Hereinafter, Embodiment 5 of the present invention will be specifically described with reference to FIG. However, Embodiment 5 shown in FIG. 6 has many points in common with Embodiment 4 shown in FIG. Therefore, in order to avoid redundant description, in Embodiment 5 shown in FIG. 6, members or elements common to FIG. 5 are assigned the same reference numerals as in FIG. 5, and descriptions thereof are omitted.

FIG. 6 is a diagram showing a basic configuration of a motor control device according to the fifth embodiment and a control mode thereof.
As shown in FIG. 6, in the fifth embodiment, a magnetic pole position estimating unit 16 is provided. Other configurations are the same as those of the fourth embodiment shown in FIG.

Thus, in the fifth embodiment, the first
Motor current converting means 14 and second motor current converting means 15
Are input to the magnetic pole position estimating means 16. Here, the motor current value is input to the drive control means 7 and further to the temperature estimating means 10 via the motor voltage calculating means 13 or directly. Then, the temperature estimating means 10 uses (adds) the motor current value in addition to the operation time, the operation state, the ambient temperature, the input current, the motor rotation speed, and the motor voltage.
This makes it possible to output a more accurate estimated temperature. In particular, since the load and efficiency of the motor 4 can be estimated from the relationship among the motor application voltage, the motor current, and the motor speed, highly accurate temperature estimation can be performed in consideration of the load and efficiency.

Further, the temperature compensating means 11 determines a temperature compensation value for the winding resistance, the induced voltage constant, and the inductance based on the estimated temperature output from the temperature estimating means 10, and determines this value as the magnetic pole position. Output to the estimating means 16. Then, the magnetic pole position estimating means 16 estimates the magnetic pole position from the winding resistance, the induced voltage constant, the temperature compensation value for the inductance, the motor current and the motor applied voltage, and calculates the estimated angle. This estimated angle is input to the drive control means 7, and the drive control means 7 controls the drive of the motor 4 based on this.

[0045]

According to the motor control device according to the first aspect of the present invention, the ambient temperature of the motor, the elapsed operation time,
Using the estimated temperature calculated based on the operating conditions typified by cooling, heating, dehumidification, and the like, the temperature change of the winding resistance, induced voltage constant, or inductance required for driving the motor is compensated. Thereby, the accuracy of drive control can be improved. As a result, drive efficiency can be improved, and vibration and noise can be reduced.

According to the motor control device according to the second to fourth aspects of the present invention, in addition to the ambient temperature of the motor, the operation elapsed time, and the operation status represented by cooling, heating, dehumidification, and the like, The temperature is estimated based on (added to) the input current, motor rotation speed, motor applied voltage, motor current, and the like. As a result, the motor temperature can be estimated with higher accuracy, and the accuracy of drive control can be further improved. As a result, drive efficiency can be further improved, and vibration and noise can be reduced more effectively.

According to the motor control device according to the fifth aspect of the present invention, the motor model expression, the motor voltage, the motor current, and the preset winding resistance, induced voltage constant, and inductance are used. , The position of the magnetic pole of the rotor is estimated, and drive control is performed based on the position. Thereby, the temperature changes of the winding resistance, the induced voltage and the inductance are compensated by the estimated temperature, and the estimation accuracy is improved.
As a result, drive efficiency can be further improved, vibration and noise can be reduced more effectively, and drive reliability can be improved.

According to the air conditioner of the present invention, the model of the compressor motor, the motor voltage, the motor current, and the preset winding resistance, induced voltage and inductance are used for the rotor. The magnetic pole position is estimated. Then, temperature changes of the winding resistance, the induced voltage, and the inductance are compensated by the estimated temperature. As a result, the driving efficiency can be improved, the vibration and noise can be effectively reduced, and the driving reliability can be improved even in an environment with a large temperature change such as in the compressor of the air conditioner.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration and a control mode of a motor control device according to a first embodiment of the present invention.

FIGS. 2A and 2B are graphs each showing a temperature curve serving as a basis for temperature estimation.

FIG. 3 is a block diagram illustrating a configuration and a control mode of a motor control device according to a second embodiment of the present invention;

FIG. 4 is a block diagram illustrating a configuration and a control mode of a motor control device according to a third embodiment of the present invention;

FIG. 5 is a block diagram showing a configuration and a control mode of a motor control device according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration and a control mode of a motor control device according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration and a control mode of a conventional motor control device.

FIG. 8 is a diagram illustrating a relationship between an actual angle and an estimated angle in magnetic pole position estimation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Commercial power supply, 2 ... Rectification smoothing circuit, 3 ... Switching element group, 4 ... Motor, 5 ... Temperature conversion means, 6 ...
Input current converting means 7 driving control means 8 time measuring means 9 operating condition determining means 10 temperature estimating means 11 temperature compensating means 12 rotational speed detecting means
13: motor voltage calculation means, 14: first motor current conversion means, 15: second motor current conversion means, 16 ...
Magnetic pole position estimating means 17 voltage converting means.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Keizo Matsui 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 3L060 AA03 CC03 CC08 CC10 EE04 5H560 AA02 BB04 DA13 DB13 DC05 EB01 EB07 JJ16 JJ19 SS07 XA02 XA03

Claims (9)

[Claims] A temperature conversion unit configured to convert a temperature around the motor into a temperature signal corresponding to the temperature; a time measurement unit configured to measure an elapsed time from a start of operation of the motor; Based on the operating condition determining means to be determined, the temperature signal output from the temperature converting means, the operating elapsed time output from the time measuring means, and the operating state data output from the operating state determining means,
Temperature estimating means for estimating and calculating the temperature of at least one of the motor and the windings and the rotor of the motor; based on the estimated temperature output from the temperature estimating means,
Temperature compensation means for outputting a temperature compensation value for at least one of winding resistance, induced voltage constant and inductance; winding resistance temperature compensation value output from the temperature compensation means; and induced voltage constant temperature compensation value And a drive control means for controlling the drive of the motor using at least one of an inductance temperature compensation value and a motor control device. 2. A switching element group comprising a plurality of switching element rows in which two switching elements are connected in cascade, and an input to a rectifying and smoothing means connected to a front side of the switching element group in a power supply direction. Input current conversion means for converting the current to be supplied to a current signal corresponding to the current, and at least one of rotation speed detection means for detecting the rotation speed of the motor, wherein the temperature estimation means Taking into account at least one of the input current signal output from the input current detection means and the motor rotation speed output from the rotation speed detection means,
The motor control device according to claim 1, wherein the estimated temperature is calculated. 3. A switching element group including a plurality of switching element rows in which two switching elements are connected in cascade, and input to a rectifying / smoothing means connected in front of the switching element group in the power supply direction. Input current conversion means for converting a current into a current signal corresponding to the current, and at least one of rotation speed detection means for detecting the rotation speed of the motor, wherein the operating condition determination means And determining an operation state of the motor based on at least one of an input current signal output from the input current detection unit and a motor rotation speed output from the rotation speed detection unit. The motor control device according to claim 1, wherein: 4. A voltage conversion means for converting a potential difference between a high potential side and a low potential side of the switching element group into a potential difference signal corresponding to the potential difference; a distribution ratio of the switching element group; Motor voltage calculation means for calculating a motor voltage signal based on the potential difference signal output from the conversion means, wherein the temperature estimating means takes into account the motor voltage signal output from the motor voltage calculation means. The motor control device according to claim 2, wherein the estimated temperature is calculated. 5. A voltage conversion means for converting a potential difference between a high potential side and a low potential side of the switching element group into a potential difference signal corresponding to the potential difference; a flow ratio of the switching element group; Motor voltage calculating means for calculating a motor voltage signal based on the potential difference signal output from the converting means, wherein the operating condition determining means takes into account the motor voltage signal output from the motor voltage calculating means. Then, it is characterized in that the operating state of the motor is determined,
The motor control device according to claim 3. 6. A switching element is provided for at least one of a group of conductors electrically connecting the switching element group and a motor winding corresponding to each connection point of the switching element row. A motor current conversion unit that converts the motor current signal into a motor current signal corresponding to the current, wherein the temperature estimation unit calculates the estimated temperature in consideration of the motor current signal output from the motor current conversion unit. The motor control device according to claim 4, wherein the motor control device is configured to perform the control. 7. A switching element is provided for at least one of a group of conductors electrically connecting the switching element group and a motor winding corresponding to each connection point of the switching element row. And a motor current conversion unit that converts the current into a motor current signal corresponding to the current, wherein the operating condition determination unit performs the operation of the motor in consideration of the motor current signal output from the motor current conversion unit. Characterized by determining the situation,
The motor control device according to claim 5. 8. A magnetic pole position of the rotor based on the motor voltage signal, the motor current signal, the winding resistance temperature compensation value, the induced voltage constant temperature compensation value, and the inductance temperature compensation value. 7. A magnetic pole position estimating means for performing an estimating calculation, wherein the drive control means performs drive control of the motor based on the estimated magnetic pole position output from the magnetic pole position estimating means. Or the motor control device according to 7. 9. An air conditioner using the motor control device according to any one of claims 1 to 8, wherein the temperature conversion means is an outdoor temperature sensor provided in an outdoor unit of the air conditioner. A temperature storage unit that stores a temperature signal output from the outside air temperature sensor immediately before the operation of the motor starts, while the motor functions as a compressor motor mounted on the outdoor unit. The temperature estimating means has a temperature signal output from the outside air temperature sensor at an arbitrary time and cooling, heating or dehumidifying operation modes, and the motor and the windings of the motor are taken into account. An air conditioner configured to estimate and calculate the temperature of at least one of the rotor and the rotor.